package netty.tcp;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

/**
 * @Description 客服端handler
 * @Author 李龙平
 * @Date 2020/10/12 10:51
 */
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    //当通道就绪 触发

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        ctx.writeAndFlush(Unpooled.copiedBuffer("hello 服务器", CharsetUtil.UTF_8));
    }

    //当通道有读取事件时  触发

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf)msg;
        System.out.println("服务器发送的数据是" + buf.toString(CharsetUtil.UTF_8));
    }

    //异常捕获

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
    }
}
